Voice Over Frame Relay Application; Figure 4-7. Switched Mode Application - ADTRAN Express 5200 User Manual

Chapter 4. Applications
When the called unit goes off-hook, the data link is established and
remains up until one of the two extensions terminates the call.

Voice Over Frame Relay Application

Voice over frame relay can be accomplished using the Express 5200
with an optional dual voice card installed (Dual FXO, FXS, or E&M
card). In this configuration, multiple units are daisy-chained at the
host site to accommodate up to eight switched OPX (off premise
extension) lines. Six lines are shown in Figure 4-8. The Express 5200
can be daisy-chained on the host end to accommodate more PBX
extensions.
4-14

Figure 4-7. Switched Mode Application

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